Kev kho thiab tiv thaiv kev ntsuas ntawm cov pob zeb tawg hauv dej nyab qhov ntawm qhov chaw nres tsheb hydropower
1.1 Txheej txheem cej luam ntawm cov dej ntws tawm qhov project ntawm Shuanghekou Hydropower Station nyob rau hauv Mengjiang River Basin
Lub qhov dej ntws tawm ntawm Shuanghekou Hydropower Station nyob rau hauv Mengjiang River Basin ntawm Guizhou xeev tau txais cov duab ntawm lub nroog rooj vag.Tag nrho qhov tob yog 528 m ntev, thiab qhov nkag thiab tawm hauv pem teb nce siab yog 536.65 thiab 494.2 m feem.Ntawm lawv, tom qab thawj cov dej cia ntawm Shuanghekou Hydropower Chaw Nres Tsheb, Tom qab kev tshuaj xyuas ntawm qhov chaw, nws tau pom tias thaum cov dej hauv cheeb tsam reservo yog siab dua qhov siab ntawm qhov siab ntawm lub plug arch ntawm qhov dej nyab, kev tsim kho. cov pob qij txha thiab cov pob qij txha txias ntawm lub phaj hauv qab ntawm lub taub hau ntev inclined ncej tsim cov dej seepage, thiab cov dej seepage npaum li cas tau nrog cov dej theem hauv thaj chaw reservoir.nce thiab nce ntxiv.Nyob rau tib lub sij hawm, dej seepage kuj tshwm sim nyob rau hauv lub sab phab ntsa pob zeb pob zeb txias pob qij txha thiab kev tsim kho pob qij txha nyob rau hauv inclined ncej seem ntawm Longzhuang.Tom qab kev tshawb nrhiav thiab kev tshawb fawb los ntawm cov neeg ua haujlwm muaj feem cuam tshuam, nws tau pom tias qhov tseem ceeb ntawm cov dej seepage hauv cov khoom no yog vim qhov tsis zoo ntawm cov pob zeb strata nyob rau hauv cov tunnels, kev kho tsis zoo ntawm cov pob qij txha ntawm kev tsim kho, kev tsim cov pob qij txha txias thaum lub caij ntuj no. pob zeb txheej txheem, thiab cov neeg pluag consolidation thiab grouting ntawm duxun qhov plugs.Jia et al.Txog rau qhov kawg no, cov neeg ua haujlwm cuam tshuam tau npaj cov txheej txheem ntawm cov tshuaj grouting ntawm thaj tsam seepage kom zoo inhibit qhov seepage thiab kho cov kab nrib pleb.
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1.2 Kev kho cov kab nrib pleb hauv qhov dej ntws tawm ntawm Shuanghekou Hydropower Station hauv Mengjiang River Basin
Tag nrho cov scoured qhov chaw ntawm qhov dej ntws tawm ntawm Luding Hydropower Station yog ua los ntawm HFC40 pob zeb, thiab feem ntau ntawm cov kab nrib pleb tshwm sim los ntawm kev tsim lub pas dej ntawm qhov chaw nres tsheb hydropower yog muab faib rau ntawm no.Raws li kev txheeb cais, cov kab nrib pleb yog qhov tseem ceeb hauv 0 + 180 ~ 0 + 600 ntu ntawm lub pas dej.Qhov chaw tseem ceeb ntawm cov kab nrib pleb yog sab phab ntsa nrog qhov nrug ntawm 1 ~ 7m los ntawm cov phaj hauv qab, thiab feem ntau ntawm qhov dav yog li 0.1 hli, tshwj xeeb tshaj yog rau txhua lub tsev rau khoom.Qhov nruab nrab ntawm qhov kev faib tawm yog feem ntau.Ntawm lawv, lub kaum sab xis ntawm qhov tshwm sim ntawm cov kab nrib pleb thiab kab rov tav lub kaum sab xis yog siab dua los yog sib npaug ntawm 45., cov duab yog tawg thiab tsis sib xws, thiab cov kab nrib pleb uas ua rau cov dej seepage feem ntau muaj me me ntawm cov dej seepage, thaum feem ntau ntawm cov kab nrib pleb. tsuas yog pom ntub dej ntawm qhov sib koom ua ke thiab cov cim dej tshwm rau ntawm cov pob zeb, tab sis muaj tsawg heev pom tseeb cov dej seepage cim.Tsis tshua muaj ib qho dej ntws me me.Los ntawm kev soj ntsuam lub sij hawm txhim kho ntawm cov kab nrib pleb, nws paub tias cov kab nrib pleb yuav tshwm sim thaum lub formwork raug tshem tawm 24 teev tom qab cov pob zeb nchuav nyob rau hauv lub sij hawm thaum ntxov, thiab ces cov kab nrib pleb yuav maj mam mus txog lub ncov lub sij hawm txog 7 hnub tom qab tshem tawm. lub formwork.Nws yuav tsis tso tseg kev loj hlob qeeb kom txog thaum l5-20 d tom qab demolding.
2. Kev kho thiab kev tiv thaiv zoo ntawm cov pob zeb tawg hauv cov dej ntws tawm ntawm cov chaw nres tsheb hydropower
2.1 Tshuaj lom neeg grouting txoj kev rau spillway qhov ntawm Shuanghekou Hydropower chaw nres tsheb
2.1.1 Taw qhia, yam ntxwv thiab teeb tsa ntawm cov ntaub ntawv
Cov khoom ntawm cov tshuaj slurry yog PCI-CW siab permeability hloov epoxy resin.Cov khoom siv muaj zog cohesive siab, thiab tuaj yeem kho tau ntawm chav tsev kub, nrog tsawg shrinkage tom qab kho, thiab tib lub sijhawm, nws muaj cov yam ntxwv ntawm cov neeg kho tshuab siab thiab ruaj khov thaum tshav kub kub, yog li nws muaj dej-nres thiab xau- nres cov teebmeem.Cov khoom siv txhawb nqa grouting no yog siv dav hauv kev kho thiab txhim kho cov dej txuag dej.Tsis tas li ntawd, cov khoom siv kuj muaj qhov zoo ntawm cov txheej txheem yooj yim, kev tiv thaiv ib puag ncig zoo, thiab tsis muaj kuab paug rau ib puag ncig.
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2.1.2 Cov kauj ruam ntawm kev tsim kho
Ua ntej, nrhiav seams thiab laum qhov.Ntxuav cov kab nrib pleb uas pom nyob rau hauv txoj kev spillway nrog high-pressure dej thiab thim rov qab cov pob zeb hauv paus nto, thiab xyuas qhov ua rau ntawm cov kab nrib pleb thiab cov kev taw qhia ntawm cov kab nrib pleb.Thiab txais yuav txoj kev sib txuas lub qhov slit thiab lub inclined qhov rau drilling.Tom qab ua tiav qhov drilling ntawm qhov inclined, nws yog ib qho tsim nyog yuav tsum siv cov cua kub siab thiab cov phom dej siab los xyuas lub qhov thiab qhov tawg, thiab ua kom tiav cov ntaub ntawv sau ntawm qhov tawg loj.
Qhov thib ob, daim ntaub qhov, sealing qhov thiab sealing seams.Ib zaug ntxiv, siv cov cua kub siab kom tshem tawm qhov grouting qhov yuav tsum tau tsim, thiab tshem tawm cov av nkos tso rau hauv qab ntawm lub kwj dej thiab ntawm phab ntsa ntawm lub qhov, thiab tom qab ntawd nruab lub grouting qhov blocker thiab kos rau ntawm lub qhov yeeb nkab. .Kev txheeb xyuas qhov grout thiab vent qhov.Tom qab cov txheej txheem txheej txheem, siv PSI-130 ceev plugging tus neeg saib xyuas los kaw cov kab noj hniav, thiab siv epoxy cement los ntxiv dag zog rau kev sib khi ntawm cov kab noj hniav.Tom qab kaw qhov qhib, nws yog ib qho tsim nyog yuav tau chisel ib zawj ntawm 2cm dav thiab 2cm tob raws li cov kev taw qhia ntawm cov pob zeb tawg.Tom qab ntxuav lub chiseled groove thiab cov retrograde siab dej, siv lub ceev plugging rau kaw qhov zawj.
Ib zaug ntxiv, tom qab kuaj xyuas qhov cua ntawm cov kav dej faus, pib ua haujlwm grouting.Thaum lub sij hawm grouting txheej txheem, cov khib-ntaus oblique qhov yog thawj zaug sau, thiab tus naj npawb ntawm qhov yog teem raws li qhov ntev ntawm cov txheej txheem tsim.Thaum grouting, nws yog ib qho tsim nyog yuav tsum xav txog tag nrho cov kev mob ntawm cov qhov nyob ib sab.Thaum cov qhov uas nyob ib sab muaj grouting, tag nrho cov dej hauv qhov grouting yuav tsum tau drained, thiab ces txuas mus rau cov yeeb nkab grouting thiab grouted.Raws li cov txheej txheem saum toj no, txhua lub qhov yog grouted los ntawm sab saum toj mus rau hauv qab thiab hauv qab mus rau siab.
Kev kho thiab tiv thaiv kev ntsuas ntawm cov pob zeb tawg hauv dej nyab qhov ntawm qhov chaw nres tsheb hydropower
Thaum kawg, grout xaus tus qauv.Cov txheej txheem siab rau cov tshuaj grouting ntawm cov pob zeb tawg hauv qhov dej ntws yog tus qauv tus nqi muab los ntawm tus tsim.Feem ntau hais lus, qhov siab tshaj plaws grouting yuav tsum tsawg dua lossis sib npaug li 1.5 MPa.Kev txiav txim siab ntawm qhov kawg ntawm grouting yog nyob ntawm tus nqi ntawm kev txhaj tshuaj thiab qhov loj ntawm lub siab grouting.Qhov tseem ceeb yuav tsum tau yog tias tom qab lub siab grouting mus txog qhov siab tshaj plaws, lub grouting yuav tsis nkag mus rau hauv lub qhov nyob rau hauv 30mm.Lub sijhawm no, cov yeeb nkab khi thiab slurry kaw haujlwm tuaj yeem ua tiav.
Ua rau thiab kev kho mob ntawm cov kab nrib pleb hauv qhov dej ntws tawm ntawm Luding Hydropower Station
2.2.1 Kev tshuaj xyuas ntawm qhov ua rau dej nyab qhov ntawm Luding Hydropower Station
Ua ntej, cov khoom siv raw muaj qhov tsis zoo sib xws thiab ruaj khov.Qhov thib ob, tus nqi ntawm cov cement hauv qhov sib tov yog loj, uas ua rau cov pob zeb ua kom muaj cua sov ntau dhau ntawm cov dej.Qhov thib ob, vim qhov loj thermal expansion coefficient ntawm pob zeb aggregates nyob rau hauv cov dej phwj tuaj, thaum kub hloov, cov aggregates thiab cov khoom hu ua coagulating dislocate.Thib peb, HF pob zeb muaj cov txheej txheem kev tsim kho siab, nws nyuaj rau tus tswv hauv kev tsim kho, thiab kev tswj lub sijhawm vibrating tsis tuaj yeem ua tau raws li tus qauv yuav tsum tau ua.Tsis tas li ntawd, vim tias qhov dej ntws tawm ntawm Luding Hydropower Station tau nkag mus, cov huab cua muaj zog tau tshwm sim, ua rau muaj qhov kub thiab txias hauv qhov av, ua rau muaj qhov kub thiab txias sib txawv ntawm cov pob zeb thiab cov chaw sab nraud.
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2.2.2 Kev kho thiab tiv thaiv cov kab nrib pleb hauv qhov dej ntws tawm
(1) Txhawm rau txo qhov cua hauv qhov av thiab tiv thaiv qhov kub thiab txias ntawm cov pob zeb, txhawm rau txo qhov kub ntawm qhov sib txawv ntawm cov pob zeb thiab ib puag ncig sab nraud, lub thav duab khoov tuaj yeem teeb tsa ntawm qhov tawm ntawm qhov dej ntws, thiab daim ntaub canvas tuaj yeem dai.
(2) Raws li qhov ua tau raws li qhov xav tau ntawm lub zog, qhov kev faib ua feem ntawm cov pob zeb yuav tsum tau hloov kho, tus nqi ntawm cov cement yuav tsum raug txo kom ntau li ntau tau, thiab cov hmoov tshauv ya yuav tsum tau nce ntxiv rau tib lub sijhawm, yog li ntawd. Lub tshav kub ntawm hydration ntawm pob zeb yuav raug txo kom tsawg, thiaj li yuav txo tau qhov kub ntawm sab hauv thiab sab nrauv ntawm pob zeb.kub txawv.
(3) Siv lub khoos phis tawj los tswj cov dej ntxiv, kom cov dej-cement ratio yog tswj nruj me ntsis hauv cov txheej txheem ntawm kev sib xyaw ua ke.Nws yuav tsum tau muab sau tseg tias thaum lub sij hawm sib tov, thiaj li yuav txo tau qhov kub thiab txias ntawm raw khoom qhov hluav taws xob, nws yog tsim nyog los txais yuav ib tug kuj tsis tshua muaj kub.Thaum thauj cov pob zeb nyob rau lub caij ntuj sov, cov thermal rwb thaiv tsev thiab kev ntsuas cua txias yuav tsum tau ua kom txo tau cov cua sov ntawm cov pob zeb thaum lub sij hawm thauj mus los.
(4) Cov txheej txheem vibrating yuav tsum tau tswj nruj me ntsis hauv cov txheej txheem kev tsim kho, thiab kev ua haujlwm vibrating tau ntxiv dag zog los ntawm kev siv cov ncej hloov tau yooj yim vibrating rods nrog diameters ntawm 100 hli thiab 70 hli.
(5) nruj me ntsis tswj qhov ceev ntawm cov pob zeb nkag mus rau hauv lub warehouse, kom nws nce ceev yog tsawg dua los yog sib npaug rau 0.8 m / h.
(6) Txuas lub sijhawm rau kev tshem tawm cov pob zeb ua 1 zaug ntawm lub sijhawm qub, uas yog, los ntawm 24 teev txog 48 teev.
(7) Tom qab dismantling lub formwork, xa cov neeg ua hauj lwm tshwj xeeb los ua cov tshuaj tsuag tu ua hauj lwm nyob rau hauv lub pob zeb project nyob rau hauv lub sij hawm.Cov dej tu yuav tsum tau khaws cia ntawm 20 ℃ lossis siab dua dej sov, thiab cov pob zeb yuav tsum tau khaws cia kom noo.
(8) Tus pas ntsuas kub tau muab faus rau hauv lub pob zeb warehouse, qhov kub thiab txias hauv cov pob zeb raug saib xyuas, thiab kev sib raug zoo ntawm cov pob zeb kub hloov pauv thiab cov khoom tawg tau raug tshuaj xyuas zoo.
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Los ntawm kev txheeb xyuas cov laj thawj thiab kev kho mob ntawm cov dej ntws tawm ntawm Shuanghekou Hydropower Station thiab cov dej ntws tawm ntawm Luding Hydropower Station, nws paub tias yav dhau los yog vim tsis zoo geological tej yam kev mob, kev kho tsis zoo ntawm kev tsim kho pob qij txha, cov pob qij txha txias thiab duxun qhov tsua. thaum lub sij hawm ua vaj tse.Cov kab nrib pleb hauv qhov dej ntws tawm los ntawm qhov tsis zoo ntawm kev sib koom ua ke thiab grouting tuaj yeem tiv thaiv tau zoo los ntawm cov tshuaj grouting nrog high-permeability hloov epoxy resin cov ntaub ntawv;Cov kab nrib pleb tom kawg tshwm sim los ntawm cov cua kub ntau dhau ntawm cov pob zeb hydration, Cov kab nrib pleb tuaj yeem kho thiab tiv thaiv tau zoo los ntawm kev txo qis ntawm cov cement thiab siv polycarboxylate superplasticizer thiab C9035 cov khoom ua vaj tse.
Post lub sij hawm: Jan-17-2022
